Step stool



FIG. 1 is a perspective view of a step stool in accordance with our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a right side elevational view thereof in an opened position, with the left side elevational view being substantially similar;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a bottom plan view of a second embodiment of a step stool in accordance with our new design, with the front, rear, right side elevational, left side elevational, and top views being substantially similar to FIGS. 1-6;

FIG. 8 is a perspective view of a third embodiment of a step stool in accordance with our new design;

FIG. 9 is a front elevational view thereof;

FIG. 10 is a rear elevational view thereof;

FIG. 11 is a right side elevational view thereof in an opened position, with the left side elevational view being substantially similar;

FIG. 12 is a top plan view thereof;

FIG. 13 is a bottom plan view thereof; and,

FIG. 14 is a bottom plan view of a fourth embodiment of a step stool in accordance with our new design, with the front, rear, right side elevational, left side elevational, and top views being substantially similar to FIGS. 9-13. 

The ornamental design for a step stool, as shown and described. 